1793 - MacKenzie Expedition reaches Pacific Ocean

The intrepid Canadian explorer, Alexander MacKenzie, led his expedition to the Pacific Ocean ten years before Lewis and Clark

July 22nd -
surmounting extraordinary difficulties with super-human efforts,
Canadian explorer Alexander MacKenzie leads a small expedition
across the Canadian Rockies to the mouth of the Frasier River and
the Pacific Ocean and returns the same year, accomplishing the feat
a dozen years before Lewis and Clark and the Corps of Discovery
ventured up the Missouri.